1a) For a population of bighorn sheep, the demographic data are as follows: the estimated effective...
1a) For a population of bighorn sheep, the demographic data are as follows: the estimated effective population size for females is 100 and males is 10. What is the effective population size?
1b) how does the reproductive system in a species affect the effective population size? what would you expect in a polygamous system? what about a polyandrous system? describe one system that demonstrates how genetic drift has acted as a evolutionary force.
Hint: you may need to do calculations/consult articles to answer 1b
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1a) For a population of bighorn sheep, the demographic data are
as follows: the estimated effective...
The bighorn sheep (Ovis canadensis) is a species of sheep native to North America named for...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
The bighorn sheep (Ovis canadensis) is a species of sheep native to North America named for...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
The bighorn sheep (Ovis canadensis) is a species of sheep native to North America named for...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
This are the questions you need to answer: In mammals, males often have greater variance in...
This are the questions you need to answer: In mammals, males often have greater variance in reproductive success than females, as a result of sexual selection. How will this alter the effective levels of allelic variation in genes on the autosomes, the X chromosome, the Y chromosome and the mitochondrial genome? What other factors may influence the genetic diversity in these different parts of the genome? Discuss this question and potential answers with one another by posting your answers on...
need help with this .. From the pages 571-587 attached below. 1a) Suppose a population of...
need help with this ..
From the pages 571-587 attached below.
1a) Suppose a population of guppies was infected with a
parasite. In that population a mutation results in a parasite
resistant genotype that spreads through the population through
natural selection. A subsequent mutation in the parasite results in
a genotype that is unaffected by the newly evolved resistant guppy
genotype. What is the name of the hypothesis that explains this
host parasite “arms race”.?
1b) What is this name...
NTRODUCTION Under nearly all circumstances, postzygotic reproductive isolation cannot evolve under the direct action of natural...
NTRODUCTION
Under nearly all circumstances, postzygotic reproductive
isolation cannot evolve under the direct action of natural
selection. Instead, postzygotic isolation evolves as a by-product
of other genetic changes as proto-species diverge. In contrast,
natural selection can directly act to enhance prezygotic
reproductive isolation. Consider two species with overlapping
ranges. If hybrids between the species are less fit than pure
species individuals, females that mated with heterospecific males
would be at a selective disadvantage, because their resulting
offspring had low fitness....
Lizards in the Cold Data Point Educator Materials Caption: Figure 1A shows the locations of the...
Lizards in the Cold
Data Point
Educator Materials
Caption:
Figure 1A shows the locations of the five anole lizard
populations in the study. Figure 2A shows the mean
CTmin (critical thermal minimum, the temperature
at which lizards lose their coordination) over time for two of the
populations. Figure 2B compares the mean CTmin
values for all five populations in the summers of 2013 (closed
circles) and 2014 (open circles). Asterisks indicate that the
CTmin for a population was significantly lower...
According to Robert Trivers, why are men generally larger and more physically aggressive than women? Because...
According to Robert Trivers, why are men generally larger and more physically aggressive than women? Because women are more reproductively “valuable” than men, hence competition for mates is fiercer among men Because men invest more heavily in reproduction than women Because men secrete more testosterone Trivers’ theory does not speculate on the origin of the sex difference in size and physical aggression Although some women are interested in casual sex (short-term mating), research has suggested that there are differences in...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
The bighorn sheep (Ovis
canadensis) is a species of sheep native to North America named for
its large horns. These horns can weigh up to 14 kg (30 lb), while
the sheep themselves weigh up to 140 kg (300 lb). The sheep live in
harems, groups of one male and multiple females. Populations of
bighorn sheep have inhabited Alberta, Canada for thousands of
years. In bighorn sheep, males fight each other by banging their
large horns together and males that...
need help with this ..
From the pages 571-587 attached below.
1a) Suppose a population of guppies was infected with a
parasite. In that population a mutation results in a parasite
resistant genotype that spreads through the population through
natural selection. A subsequent mutation in the parasite results in
a genotype that is unaffected by the newly evolved resistant guppy
genotype. What is the name of the hypothesis that explains this
host parasite “arms race”.?
1b) What is this name...
NTRODUCTION
Under nearly all circumstances, postzygotic reproductive
isolation cannot evolve under the direct action of natural
selection. Instead, postzygotic isolation evolves as a by-product
of other genetic changes as proto-species diverge. In contrast,
natural selection can directly act to enhance prezygotic
reproductive isolation. Consider two species with overlapping
ranges. If hybrids between the species are less fit than pure
species individuals, females that mated with heterospecific males
would be at a selective disadvantage, because their resulting
offspring had low fitness....
Lizards in the Cold
Data Point
Educator Materials
Caption:
Figure 1A shows the locations of the five anole lizard
populations in the study. Figure 2A shows the mean
CTmin (critical thermal minimum, the temperature
at which lizards lose their coordination) over time for two of the
populations. Figure 2B compares the mean CTmin
values for all five populations in the summers of 2013 (closed
circles) and 2014 (open circles). Asterisks indicate that the
CTmin for a population was significantly lower...
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